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What is a bi-pole pot magnet?

What is a bi-pole pot magnet?

Steel poles and magnet in a bi-pole pot magnet A bi-pole pot magnet has a thin magnet in the centre with two mild steel poles on either side, surrounded by a shell, hence its name. This is known as a sandwich magnet system.
Strength A sandwich magnet system makes the bi-pole pot magnet thirty-two times stronger than a standard magnet, such as a bar magnet. The two steel poles on the sides of the magnet concentrate the magnetic field lines, making the magnet stronger.
Superglue The bi-pole pot magnet does not have a way of attaching itself to non-ferromagnetic materials, and this is known as blind-ended. This means that bi-pole pot magnets either have to be glued into place or used in a press fit installation.

Press-fit installations

Friction A press-fit installation, also known as an interference fit, is where friction holds two objects together without any other means of fastening. This is used in applications where the magnet is not meant to be easily removed, such as a jig or fixture.
A jig is a custom-made tool created to control another tool’s movements, whereas a fixture holds a tool in an exact position. The bi-pole magnet is press-fitted or glued in place on the jig to help hold a non-ferromagnetic material, such as a piece of wood, onto a ferromagnetic surface whilst it is being drilled.

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